I found this link to an on-line auction in Danbury, CT this weekend. There are 723 lots of O gauge with some standard gauge and live steam. The O gauge is about 60% Lionel of all eras. 35% MTH, and 5 Atlas and Williams. Here is the link:
http://www.liveauctioneers.com...-train-auction/page1
There is a Z4000, Century Club, 6464 boxcars, both Premier and Railking cars plus a few locos. All the Atlas is cars.
Jan